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2. Skylight - Wikipedia

   en.wikipedia.org/wiki/Skylight

   Contemporary skylights using glass infill (windows) typically use sealed insulating glass units (IGU) made with two panes of glass. These types of products are NFRC-ratable for visible transmittance. Assemblies with three panes can sometimes be cost-justified in the coldest climate zones, but they lose some light by adding the third layer of glass.

3. Storm window - Wikipedia

   en.wikipedia.org/wiki/Storm_window

   Storm windows are an inexpensive add-on: even the best storm windows—three track exterior windows with low thermal emission—will cost a small fraction of the price of standard replacement windows. [citation needed] Interior storm windows can, however, produce condensation and be visually obstructive; exterior storm windows can also have a ...

4. Window shutter - Wikipedia

   en.wikipedia.org/wiki/Window_shutter

   The term window shutter includes both interior shutters, used on the inside of a house or building, and exterior shutters, used on the outside of a structure. On some styles of buildings it is common to have shutters to cover the doors as well as the windows. [1]

5. Insulated glazing - Wikipedia

   en.wikipedia.org/wiki/Insulated_glazing

   Insulating glass is an evolution from older technologies known as double-hung windows and storm windows. Traditional double-hung windows used a single pane of glass to separate the interior and exterior spaces. In the summer, a window screen would be installed on the exterior over the double-hung window to keep out animals and insects.

6. Conservation and restoration of lighthouses - Wikipedia

   en.wikipedia.org/wiki/Conservation_and...

   The lantern is the large round glass structure, that houses the lens, located at the top of the lighthouse. This structure is made out of multiple materials, primarily glass, wood, and iron. Any conservation or restoration processes should keep in mind that the lantern, ventilation shafts, and lens should not be obstructed in any way.

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.